The current study extends previous work of our group which aims to show that the comparison of functional relations is carried out by running dual perceptual-motor simulations. To this end, we present an experiment which tests the hypothesis that the asymmetries of human bodies may constrain performance in a relation comparison task. Participants were asked to compare functional relations between graspable objects while bearing sports weights on their wrists. The results of the experiment support the hypothesis. The fact that a manipulation of the participants ’ bodies may affect performance in a purely conceptual task is pointed out as strong evidence in support of the embodied cognition approach.